React Data GridExpressions and Context
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Below shows a complex example making use of value getters (using expressions) and class rules (again using expressions). The grid shows 'actual vs budget data and yearly total' for widget sales split by city and country.

  • The Location column is showing the aggregation groups, grouping by city and country.
  • The Monthly Data columns are affected by the context. Depending on the selected period, the data displayed is either actual (x_act) or budgeted (x_bud) data for the month (eg. jan_act when Jan is green, or jan_bud when Jan is red). Similarly, the background color is also changed using class rules dependent on the selected period.
  • sum(YTD) is the total of the 'actual' figures, i.e. adding up all the green. This also changes as the period is changed.


Notice that the example (including calculating the expression on the fly, the grid only calculates what's needed to be displayed) runs very fast (once the data is loaded) despite having over 6,000 rows.

This example is best viewed by opening it in a new tab.